Battery cell polarity detection device and detection system

The embodiment of the utility model discloses a cell polarity detection device and a detection system. The cell polarity detection device comprises a display module, a communication mother board and a cell polarity detection module which are connected in sequence, the communication mother board comprises a connector, and the connector is used for connecting a cell polarity detection module; the cell polarity detection module comprises a pin-type connector, and the pin-type connector is connected with the connector; a plurality of probe blocks are arranged at the bottom of the cell polarity detection module, the probe blocks are used for connecting positive and negative poles of a to-be-detected cell, and the positions of the probe blocks are adjusted through sliding; the cell polarity detection module is used for detecting the polarity of a cell to be detected, converting a detection result into a CAN message and transmitting the CAN message to the display module through the communication mother board, and th